Problem #9

Borel boundedness of CBERs

Open!!High impact — resolution would likely be publishable in a top journal (Advances-level or above)

Is every countable Borel equivalence relation Borel bounded?

Reference for the problem statement

[BJ07]Charles M. Boykin and Steve Jackson, Borel boundedness and the lattice rounding property, Contemporary Mathematics, 2007 [doi]

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